edit_post
Change a forum post through Moodle's own form, as its author (within the site's editing time) or a moderator: its subject, message (HTML), and attachments to add or remove. Only what's given changes. Returns the post afterwards (its author as an alias when the server pseudonymizes). Visible to th...
This record as markdown: /tools/falkenslab-moodle-mcp/edit-post.md
What edit_post does on Moodle
AI agents use edit_post to create or update resources in Moodle, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Moodle environment.
| Parameter | Type | Required | Description |
|---|---|---|---|
embed | array | — | Absolute local files (images…) to embed in the HTML, which names each by its file name: <img src="shot.png"> |
postId | integer | Yes | As get_discussion gives it |
message | string | — | HTML; no aliases in it, since people read it |
subject | string | — | |
addFiles | array | — | Absolute local paths to attach |
removeFiles | array | — | Attachments' names to remove |
Parameters from the server's own tool schema.
Why edit_post is rated Medium
An AI agent can call edit_post faster than any human can review: one bad instruction and it creates or modifies resources in Moodle by the hundred, each call as confident as the last.
Attacks that exploit this kind of access
The rule that runs edit_post safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Moodle, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For edit_post, this is the rule to start with:
edit_post stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Moodle, apply this rule, and every edit_post call is checked against it from then on.
Questions about edit_post
Change a forum post through Moodle's own form, as its author (within the site's editing time) or a moderator: its subject, message (HTML), and attachments to add or remove. Only what's given changes. Returns the post afterwards (its author as an alias when the server pseudonymizes). Visible to the forum: confirm with the person first. It is categorised as a Write tool in the Moodle MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
edit_post accepts 6 parameters: embed, postId, message, subject, addFiles, removeFiles. Required: postId. The full parameter table on this page comes from the server's own tool schema.
Register the Moodle MCP server in PolicyLayer and add a rule for edit_post: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Moodle. Nothing to install.
edit_post is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the edit_post rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for edit_post. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
edit_post is provided by the Moodle MCP server (@falkenslab/moodle-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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